C0 Model

DTC detecting condition: 

• ID code box malfunction
• When inaccessible to ROM in ID code box.

1. CHECK DTC  .
   1. Turn the ignition switch to ON.
   2. Perform the clear memory operation of ECM. Ref. to ENGINE (DIAGNOSTICS) (STI)>Clear Memory Mode . Ref. to ENGINE (DIAGNOSTICS) (EXCEPT FOR STI)>Clear Memory Mode
   3. Turn the ignition switch to OFF.
   4. Register the ID code box.
   5. Read the DTC again. Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>Read Diagnostic Trouble Code (DTC) 

   Is DTC B1577 displayed?

   Yes: Replace the ID code box. Ref. to SECURITY AND LOCKS>ID Code Box

   No: Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

   NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.